package com.product.shop.controller;

import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.internal.util.AlipaySignature;
import com.alipay.api.request.AlipayTradePagePayRequest;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;

import com.product.miaosha.entity.MiaoshaActivityEntity;
import com.product.shop.dao.GoodsDao;
import com.product.shop.dao.OrderInfoDao;
import com.product.shop.entity.GoodsEntity;
import com.product.shop.entity.OrderInfoEntity;
import com.product.shop.feign.MiaoShaGoodsFeign;
import com.product.shop.util.AlipayConfig;
import com.product.shop.util.IdWorker;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.io.UnsupportedEncodingException;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

@Controller
@RequestMapping("shop/alipay")
public class AlipayController {
    @Autowired
    private OrderInfoDao orderInfoDao;

    @Autowired
    private GoodsDao goodsDao;

    @Autowired
    private MiaoShaGoodsFeign miaoShaGoodsFeign;

    @Autowired
    private IdWorker idWorker;

    @Autowired
    private RedisTemplate redisTemplate;
@ResponseBody
    @RequestMapping("alipay")
    public String alipay(@RequestParam("id") Integer id) throws AlipayApiException, UnsupportedEncodingException {
        //获得初始化的AlipayClient
        AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl, AlipayConfig.app_id, AlipayConfig.merchant_private_key, "json", AlipayConfig.charset, AlipayConfig.alipay_public_key, AlipayConfig.sign_type);
        OrderInfoEntity orderInfoEntity = orderInfoDao.selectById(id);

        //设置请求参数
        AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
        alipayRequest.setReturnUrl(AlipayConfig.return_url);
        alipayRequest.setNotifyUrl(AlipayConfig.notify_url);
        String goodsPrice = orderInfoEntity.getGoodsPrice().toString();
        //商户订单号，商户网站订单系统中唯一订单号，必填
        String out_trade_no = new String(orderInfoEntity.getOrderId().getBytes("ISO-8859-1"),"UTF-8");
        //付款金额，必填
        String total_amount = new String(goodsPrice.getBytes("ISO-8859-1"),"UTF-8");
        //订单名称，必填
        String subject = new String(orderInfoEntity.getGoodsName().getBytes("ISO-8859-1"),"UTF-8");
        //商品描述，可空
        String body = new String(orderInfoEntity.getGoodsName().getBytes("ISO-8859-1"),"UTF-8");

        alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\","
                + "\"total_amount\":\""+ total_amount +"\","
                + "\"subject\":\""+ subject +"\","
                + "\"body\":\""+ body +"\","
                + "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");

        //若想给BizContent增加其他可选请求参数，以增加自定义超时时间参数timeout_express来举例说明
        //alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\","
        //		+ "\"total_amount\":\""+ total_amount +"\","
        //		+ "\"subject\":\""+ subject +"\","
        //		+ "\"body\":\""+ body +"\","
        //		+ "\"timeout_express\":\"10m\","
        //		+ "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");
        //请求参数可查阅【电脑网站支付的API文档-alipay.trade.page.pay-请求参数】章节

        //请求
        String result = alipayClient.pageExecute(alipayRequest).getBody();

        //输出
        System.out.println(result);
        return result;
    }

    //回调
    @RequestMapping("alipayretuen")
    public String retuen(HttpServletRequest request) throws UnsupportedEncodingException, AlipayApiException {
        //获取支付宝GET过来反馈信息
        Map<String,String> params = new HashMap<String,String>();
        Map<String,String[]> requestParams = request.getParameterMap();
        for (Iterator<String> iter = requestParams.keySet().iterator(); iter.hasNext();) {
            String name = (String) iter.next();
            String[] values = (String[]) requestParams.get(name);
            String valueStr = "";
            for (int i = 0; i < values.length; i++) {
                valueStr = (i == values.length - 1) ? valueStr + values[i]
                        : valueStr + values[i] + ",";
            }
            //乱码解决，这段代码在出现乱码时使用
            valueStr = new String(valueStr.getBytes("ISO-8859-1"), "utf-8");
            params.put(name, valueStr);
        }

//        boolean signVerified = AlipaySignature.rsaCheckV1(params, AlipayConfig.alipay_public_key, AlipayConfig.charset, AlipayConfig.sign_type); //调用SDK验证签名

        //——请在这里编写您的程序（以下代码仅作参考）——
//        if(signVerified) {
            //商户订单号
            String out_trade_no = new String(request.getParameter("out_trade_no").getBytes("ISO-8859-1"),"UTF-8");
            OrderInfoEntity order = orderInfoDao.selectOne(new QueryWrapper<OrderInfoEntity>().eq("order_id", out_trade_no));
            //修改订单状态
            order.setStatus(1);
            //添加支付时间
            order.setPayDate(new Date());
            orderInfoDao.updateById(order);
            //获取用户id
            Integer userId = order.getUserId();
            //把用户id和商品id存入到redis中,以后用来该用户是否买过该商品,防止超买
            redisTemplate.boundHashOps(userId).put("goodId",order.getGoodsId());
            //获取redis中该商品数量
            Integer stockCount = (Integer) redisTemplate.boundHashOps(order.getGoodsId()).get("StockCount");
            //获取redis中用户购买的商品数量
            Integer ShopStock = (Integer) redisTemplate.boundHashOps(order.getUserId()).get("goodsStock");
            //支付成功后,在数据库中减去对应商品的库存
            //查找数据库中秒杀商品的库存
            MiaoshaActivityEntity miaoshaActivityEntity = miaoShaGoodsFeign.MiaoShaGoodsInfo(order.getGoodsId());
            //修改秒杀商品中的库存数量
            miaoshaActivityEntity.setStockCount(miaoshaActivityEntity.getStockCount()-ShopStock);
            miaoShaGoodsFeign.update(miaoshaActivityEntity);
            //修改商品中的库存数量
            GoodsEntity goodsEntity = goodsDao.selectById(order.getGoodsId());
            goodsEntity.setGoodsStock(goodsEntity.getGoodsStock()-ShopStock);
            goodsDao.updateById(goodsEntity);


        //支付宝交易号
            String trade_no = new String(request.getParameter("trade_no").getBytes("ISO-8859-1"),"UTF-8");

            //付款金额
            String total_amount = new String(request.getParameter("total_amount").getBytes("ISO-8859-1"),"UTF-8");

            System.out.println("trade_no:"+trade_no+"<br/>out_trade_no:"+out_trade_no+"<br/>total_amount:"+total_amount);
            return "redirect:http://127.0.0.1:5500/order.html";
//        }else {
//            System.out.println("验签失败");
//            return "fail";
//        }
    }
}



